QED423 Infrared Emitter - Equivalent & Substitute Parts

Part Overview

The QED423 is an infrared (IR) emitter operating at 880nm wavelength, designed for through-hole mounting in TO-46-2 package configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The QED423 delivers 20mW/sr radiant intensity at 100mA forward current with a 30° viewing angle and operates across the -40°C to 100°C temperature range.

Substiute Parts

QED423

onsemiIn Stock: 69741QED423 Datasheet

Current PartRFQ

QED223

onsemiIn Stock: 5499QED223 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QED423 is determined by the following critical parameters:

• Wavelength: Must remain 880nm for receiver compatibility
• Maximum Forward Current (If): Must support 100mA operation
• Radiant Intensity (Ie): Minimum 20mW/sr @ 100mA required for optical performance
• Viewing Angle: 30° specification must be maintained
• Operating Temperature Range: Must cover -40°C to 100°C
• Mounting Type: Through-hole configuration required

The QED223 qualifies as a functional substitute based on matching wavelength, forward current rating, viewing angle, temperature range, and through-hole mounting. Package form factor differs (radial 5mm vs. TO-46-2), requiring mechanical redesign of the PCB footprint.

Parameter Comparison

Engineering Selection Recommendations

The QED223 is the designated substitute for the obsolete QED423. Both components are manufactured by onsemi and share identical wavelength, forward current rating, viewing angle, and operating temperature specifications. The QED223 offers superior radiant intensity (25mW/sr vs. 20mW/sr) and lower forward voltage (1.7V vs. 1.8V), providing improved optical efficiency.

The QED223 carries active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The primary design consideration is package transition from TO-46-2 (axial) to radial 5mm (T 1 3/4) configuration, which requires PCB footprint modification.

Frequently Asked Questions (FAQ)

Q: Can the QED223 directly replace the QED423 without PCB modification?

A: No. The QED423 uses TO-46-2 axial package while the QED223 uses radial 5mm package. PCB footprint redesign is required. Electrical performance is compatible.

Q: What are the key electrical compatibility factors?

A: Wavelength (880nm), maximum forward current (100mA), viewing angle (30°), and operating temperature range (-40°C to 100°C) are identical between both parts. Forward voltage differs slightly (1.8V vs. 1.7V), which is within typical circuit tolerance.

Q: Why is the QED423 obsolete?

A: The QED423 is classified as obsolete by the manufacturer. The QED223 represents the active product line continuation for 880nm infrared emitters in this performance class.

Q: Does the QED223 meet regulatory requirements?

A: Yes. The QED223 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Is the higher radiant intensity of the QED223 a concern?

A: No. The QED223 delivers 25mW/sr compared to the QED423's 20mW/sr minimum specification. This represents improved optical performance and does not create compatibility issues in receiver circuits designed for the QED423.